Package org.apache.flink.runtime.io.network.partition

Class PipelinedResultPartition

java.lang.Object

org.apache.flink.runtime.io.network.partition.ResultPartition

org.apache.flink.runtime.io.network.partition.BufferWritingResultPartition

org.apache.flink.runtime.io.network.partition.PipelinedResultPartition

All Implemented Interfaces:

AutoCloseable, AvailabilityProvider, ResultPartitionWriter, ChannelStateHolder, CheckpointedResultPartition

public class PipelinedResultPartition
extends BufferWritingResultPartition
implements CheckpointedResultPartition, ChannelStateHolder

A result output of a task, pipelined (streamed) to the receivers.

This result partition implementation is used both in batch and streaming. For streaming, it supports low latency transfers (ensure data is sent within x milliseconds) or unconstrained while for batch it transfers only once a buffer is full. Additionally, for streaming use this typically limits the length of the buffer backlog to not have too much data in flight, while for batch we do not constrain this.

Specifics of the PipelinedResultPartition

The PipelinedResultPartition cannot reconnect once a consumer disconnects (finished or errored). Once all consumers have disconnected (released the subpartition, notified via the call onConsumedSubpartition(int)) then the partition as a whole is disposed and all buffers are freed.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

AvailabilityProvider.AvailabilityHelper

Field Summary

Fields inherited from class org.apache.flink.runtime.io.network.partition.BufferWritingResultPartition

subpartitions

Fields inherited from class org.apache.flink.runtime.io.network.partition.ResultPartition

bufferCompressor, bufferPool, LOG, numBuffersOut, numBytesOut, numSubpartitions, partitionId, partitionManager, partitionType, resultPartitionBytes

Fields inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

AVAILABLE

Constructor Summary

Constructors

Constructor	Description
PipelinedResultPartition(String owningTaskName, int partitionIndex, ResultPartitionID partitionId, ResultPartitionType partitionType, ResultSubpartition[] subpartitions, int numTargetKeyGroups, ResultPartitionManager partitionManager, BufferCompressor bufferCompressor, org.apache.flink.util.function.SupplierWithException<BufferPool,IOException> bufferPoolFactory)

Method Summary

Modifier and Type	Method	Description
void	addRecovered(int subpartitionIndex, BufferConsumer bufferConsumer)
void	close()	Closes the partition writer which releases the allocated resource, for example the buffer pool.
void	finishReadRecoveredState(boolean notifyAndBlockOnCompletion)
void	flush(int targetSubpartition)	Manually trigger the consumption of data from the given subpartitions.
void	flushAll()	Manually trigger the consumption of data from all subpartitions.
CompletableFuture<Void>	getAllDataProcessedFuture()	Gets the future indicating whether all the records has been processed by the downstream tasks.
ResultSubpartitionInfo	getCheckpointedSubpartitionInfo(int subpartitionIndex)	Gets the checkpointed subpartition info with the given subpartitionIndex.
void	notifyEndOfData(StopMode mode)	Notifies the downstream tasks that this ResultPartitionWriter have emitted all the user records.
void	onSubpartitionAllDataProcessed(int subpartition)	The subpartition notifies that the corresponding downstream task have processed all the user records.
BufferBuilder	requestBufferBuilderBlocking()
void	setChannelStateWriter(ChannelStateWriter channelStateWriter)	Injects the ChannelStateWriter.
String	toString()

Methods inherited from class org.apache.flink.runtime.io.network.partition.BufferWritingResultPartition

abortCheckpoint, addToSubpartition, alignedBarrierTimeout, broadcastEvent, broadcastRecord, createSubpartitionView, emitRecord, finish, flushAllSubpartitions, flushSubpartition, getAllPartitions, getHardBackPressuredTimeMsPerSecond, getNumberOfQueuedBuffers, getNumberOfQueuedBuffers, getSizeOfQueuedBuffersUnsafe, releaseInternal, setMetricGroup, setupInternal

Methods inherited from class org.apache.flink.runtime.io.network.partition.ResultPartition

canBeCompressed, checkInProduceState, createSubpartitionView, fail, getAvailableFuture, getBufferPool, getFailureCause, getNumberOfSubpartitions, getNumTargetKeyGroups, getOwningTaskName, getPartitionId, getPartitionIndex, getPartitionManager, getPartitionType, getResultPartitionBytes, isFinished, isNumberOfPartitionConsumerUndefined, isNumberOfPartitionConsumerUndefined, isReleased, release, release, setMaxOverdraftBuffersPerGate, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

isApproximatelyAvailable, isAvailable

Constructor Details

PipelinedResultPartition

public PipelinedResultPartition(String owningTaskName,
 int partitionIndex,
 ResultPartitionID partitionId,
 ResultPartitionType partitionType,
 ResultSubpartition[] subpartitions,
 int numTargetKeyGroups,
 ResultPartitionManager partitionManager,
 @Nullable
 BufferCompressor bufferCompressor,
 org.apache.flink.util.function.SupplierWithException<BufferPool,IOException> bufferPoolFactory)

Method Details

setChannelStateWriter

public void setChannelStateWriter(ChannelStateWriter channelStateWriter)

Description copied from interface: ChannelStateHolder

Injects the ChannelStateWriter. Must only be called once.

Specified by:

setChannelStateWriter in interface ChannelStateHolder

getCheckpointedSubpartitionInfo

public ResultSubpartitionInfo getCheckpointedSubpartitionInfo(int subpartitionIndex)

Description copied from interface: CheckpointedResultPartition

Gets the checkpointed subpartition info with the given subpartitionIndex.

Specified by:

getCheckpointedSubpartitionInfo in interface CheckpointedResultPartition

flushAll

public void flushAll()

Description copied from interface: ResultPartitionWriter

Manually trigger the consumption of data from all subpartitions.

Specified by:

flushAll in interface ResultPartitionWriter

flush

public void flush(int targetSubpartition)

Description copied from interface: ResultPartitionWriter

Manually trigger the consumption of data from the given subpartitions.

Specified by:

flush in interface ResultPartitionWriter

notifyEndOfData

public void notifyEndOfData(StopMode mode)
                     throws IOException

Description copied from interface: ResultPartitionWriter

Notifies the downstream tasks that this ResultPartitionWriter have emitted all the user records.

Specified by:

notifyEndOfData in interface ResultPartitionWriter

Overrides:

notifyEndOfData in class ResultPartition

Parameters:

mode - tells if we should flush all records or not (it is false in case of stop-with-savepoint (--no-drain))

Throws:

IOException

getAllDataProcessedFuture

public CompletableFuture<Void> getAllDataProcessedFuture()

Description copied from interface: ResultPartitionWriter

Gets the future indicating whether all the records has been processed by the downstream tasks.

Specified by:

getAllDataProcessedFuture in interface ResultPartitionWriter

Overrides:

getAllDataProcessedFuture in class ResultPartition

onSubpartitionAllDataProcessed

public void onSubpartitionAllDataProcessed(int subpartition)

Description copied from class: ResultPartition

The subpartition notifies that the corresponding downstream task have processed all the user records.

Overrides:

onSubpartitionAllDataProcessed in class ResultPartition

Parameters:

subpartition - The index of the subpartition sending the notification.

See Also:

• EndOfData

toString

public String toString()

Overrides:

toString in class ResultPartition

finishReadRecoveredState

public void finishReadRecoveredState(boolean notifyAndBlockOnCompletion)
                              throws IOException

Specified by:

finishReadRecoveredState in interface CheckpointedResultPartition

Throws:

IOException

requestBufferBuilderBlocking

public BufferBuilder requestBufferBuilderBlocking()
                                           throws IOException,
RuntimeException,
InterruptedException

Specified by:

requestBufferBuilderBlocking in interface CheckpointedResultPartition

Throws:

IOException

RuntimeException

InterruptedException

addRecovered

public void addRecovered(int subpartitionIndex,
 BufferConsumer bufferConsumer)
                  throws IOException

Specified by:

addRecovered in interface CheckpointedResultPartition

Throws:

IOException

close

public void close()

Description copied from interface: ResultPartitionWriter

Closes the partition writer which releases the allocated resource, for example the buffer pool.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ResultPartitionWriter

Overrides:

close in class BufferWritingResultPartition